Lock Right Owners Manual
Contents
1. 14 water can be sucked in past the oil seals and into the gear oil Until they mix the water will settle to the bottom it is important to carefully crack open the drain plug and remove the water as soon as possible to prevent rust and corrosion After the oil and water have emulsified mixed on a microscopic level high temperatures may not drive the water out as readily as before mixing Also the oil and water mixture will not lubricate well and will cause corrosion so replace it with fresh lubricant as soon as possible A similar high temperature then vacuum situation can occur with U joints After submersion they should be greased as soon as possible to drive out any water Troubleshooting Your New LOCK RIGHT is designed to oper ate trouble free If unusual noises or jerking begin to oc cur the assembly should be removed and examined for anything either excessively worn or broken Any bad parts should be replaced Also see the note at the end of the warranty section about increases in horsepower and or tire size The slight clicking sometimes heard during cornering can also aid in trouble shooting If your vehicle is turning and no clicking sound is heard at all even in a tight turn an axle shaft may be broken and further checks should be made see the in stallation manual for details Briefly block the vehicle put it in gear or in park and release the emergency brake jack up both tires rotate and hold one and spin2. Do not drive on hard sur roads in 4WD because Driveline wind up oc even more rapidly with a locking differential faced curs than with a standard differential With a LOCK RIGHT in the front axle driving on hard dirt roads in 4WD also is not recommended because understeer will occur and also simply because it is not needed Power Be very careful when applying a lot of power If an axle shaft breaks the vehicle may turn rapidly to one side and or the steering will be affected Also be careful when driving in an emergency with only one axle shaft Your new LOCK RIGHT equipped vehicle now has much more traction than before This means that it will climb farther and become stuck less so be careful about where you are go ing and be sure that you can either turn around or back down On slippery surfaces especially on ice accelerating during cor nering can make the vehicle tend to straighten out so drive carefully When decelerating under slippery conditions use the engine rather than the brakes to slow down When ona hill don t get your vehicle sideways When parking be sure to use the emergency brake Obey all safety precautions outlined 13 in the manufacturer s manuals Experience the ultimate in 4WD off road Just point your vehicle and go almost anywhere Be conservative in how you get there however because a traction adding differen tial can get you into more trouble than a standard differential Remember the
3. LOCK RIGHT gets you farther more easily but doesn t make up for carelessness and inexperience Be careful and have fun Lubrication The LOCK RIGHT is designed to operate with any lubri cant that is made for use with differential gears For warmer cli mates we recommend a weight of 85 140 to provide adequate lubrication and to minimize the normal clicking sound around corners For colder climates we recommend a light oil such as 75 90 as recommended by the vehicle manufacturer Temperature and Moisture Temperature the LOCK RIGHT will operate at any tem perature that is likely to be encountered in the field However if your vehicle has been parked all night in the snow for example the gear oil can become as thick as honey and this can cause the parts to move more slowly than normal We suggest that you drive the vehicle for a few miles on road to warm up the oil be fore taking it off road If you are already off road drive easily for a while before doing difficult climbing Moisture The following comments involve the whole power train and we offer them to help assure a long life for your vehicle in general and for your LOCK RIGHT in particular Sustained driving will substantially increase the temperature of the axle housing transmission transfer case etc If these units are suddenly plunged into cold wa ter as when crossing a stream for example rapid cooling can produce a vacuum If the housing remains submerged
4. that each wheel turns at a slightly different rate than the others because of the individual turning radii In a 4WD behicle with all wheels en gaged the wheels try to slip a little as the vehicle is turning On a dirt surface this action occurs unnoticed On a paved road however the wheels are locked to the pavement so that they are unable to slip Since they are all connected together through the drive train and are turning at different rates something must give The result is that all memeber sin the drive train drive shafts U joints axles gears etc become highly stressed and either something breaks ore the parts bind up and the vehicle will not steer or move This condition is known as driveline wind up and is the reason that the manufacturers manuals state that the vehicle should never be driven on hard surfaced roads in 4WD This especially is true of vehicles with locking differentials because wind up occurs even more quickly than with standard differentials Two LOCK RIGHTs The LOCK RIGHT in the rear axle produces about 70 of the total difference in traction between two LOCK RIGHTs and no LOCK RIGHTs Therefore four wheel drive will be needed less often than before because two wheel drive now will get you farther If you are in four wheel drive where it is not needed the steering will tend to become stiffer than normal because of increased friction in the front axle uni versal joints and the vehicle also w
5. Introduction Important Information The LOCK RIGHT Function Operation Features Exploded View Front Axle Disconnect Operation Vehicle Performance Vehicle Operation Driving Precautions Driving Information Summarized LOCK RIGHT Performace Locker Vehicle Owner s Manual Table of Contents LUD II CAI OM EEE E E 13 Temperature and MOiISture ccccccccccccsssssececececsesteaeseeeeeceeeees 14 TrOUDICSHOOTING 0 0 cccceseeccccsessecccecesseasecececeseseecesceeseaeseseseeeaeees 14 SOPVICIAG 5 cccscevsces abide eventos cuavasessveveess E E A bes svengeessdebes 15 Important Warranty Information ccccccccssececsssscceesseeeesssaees 15 Limited Warranty cccccccccccsssssecececeesesssseseeseecsesesaeeeeeesceeseeaees 16 RICHMOND Introduction Congratulations on your selection of the new LOCK RIGHT automatic 100 full locking differential Just watch soon it will be getting you and your vehicle into and out of many places that would have been difficult or impossible to reach with out it Better yet a 4x4 with LOCK RIGHTs in both ends will give you the most traction that you can get Also note that a 4x2 with a LOCK RIGHT in the rear axle will be about as effective as a 4x4 with standard open differentials and in some situations even better Because it will make such an amazing difference in how your vehicle performs we re sure that you ll enjoy be longing to the growing family of LOCK RIGHT owners
6. ME MODELS THRUST COUPLER DRIVER STOP PIN PINION BIAS DRIVER COUPLER THRUST WASHER SIDE GEAR SPACER SHAFT S SRPINGS SIDE GEAR WASHER BLOCK Figure 1 LOCK RIGHT Exploded View 4 The drivers and couplers are made from carbon steel aircraft alloy and are heat treated for toughness and durability It uses standard gear oil rather than a special limit ed slip differential lubricant It can be easily installed by anyone familiar with general automotive work With care it can be installed without altering the drive pinion and ring gear settings they do not need to be set up again It minimizes the tire wear that is associated with some other lockers and also with limited slip clutch pack differentials by allowing free rotation of the outside wheel during a turn It can increase gas mileage off road in either a 4x4 or a 4x2 because of more efficiency due to increased traction espe cially in sand It has been operated extensively off road in some of the most rugged trucks in the world military and civilian and has been triple checked for proper materials and design We be lieve that it will last for as long as would your conventional open differential It provides you with the best off road traction available No other type of differential can match it in allowing up to 100 of the engine power to be applied to either wheel even when the other one is off the ground the reason that the LOCK RIGHT will allow your vehic
7. Welcome Important Information Be sure to have any drivers of your vehicle care fully read and understand the sections in this manu al beginning on page 7 that describe vehicle operation and on page 10 that describe driving precautions The LOCK RIGHT produces some minor but noticeable differenc es on road while giving your vehicle major increases in trac tion off road It is very important for the driver to read and understand these characteristics We suggest that you store this manual in the glove compartment for reference The LOCK RIGHT Function The standard open differential always divides torque equally between the wheels If one wheel slips and starts spin ning with only a small amount of torque applied the other wheel also receives only this same small amount and your vehicle stops To solve this problem the LOCK RIGHT automatically de livers up to 100 of the available engine torque to either wheel so that the one with the most traction will help keep you moving Operation The LOCK RIGHT consists of two bi directional over run ning dog toothed clutches Each one has a driving member the driver and a driven member the coupler or in some models the existing side gear Both clutches are rotated by the pinion shaft s or the spider Each driver has special recesses cut in one face that receive the shaft s and radial teeth cut in the op posite face see Figure 1 Each driver mates with its coupler
8. as with some other lockers or limited slip differentials Applying only a little throttle will eliminate the noise c Clunk As mentioned on page 7 the LOCK RIGHT has about 25 of free drive shaft rotation built into it so that it can operate properly This backlash may produce a clunk in the driveline when getting on and off the gas that is perfectly normal This noise is more prevalent with stick shift vehicles than with au tomatic transmission vehicles but the operator should be aware that it exists Also be sure that the unit is installed properly be fore attributing any noise to the locker itself Get Ready Your vehicle is now equipped with the LOCK RIGHT Test it first by driving on paved roads then take it off road Now it will really climb Try it in two wheel drive and see how much farther you can now go where before you needed four wheel drive Put it into four wheel drive and really go to town but be careful and drive conservatively Be sure to read and understand the following sections 10 Driving Precautions WARNING Failure to observe the precautions in this manual may result in damage to your new LOCK RIGHT and or injury to personnel The manufacturer wholesalers and distribu tors who sell the LOCK RIGHT do so with the express stipulation that the owner and or operator is responsible for proper LOCK RIGHT installation and safe vehicle operation see the warranty for more details The following comment is
9. contained in the warranty but also needs to be stated in this section Neither manufacturer nor seller will be liable for any injury loss damage or inconve nience arising directly or indirectly from the installation or use of thes LOCK RIGHT parts or the inability to install or use same The LOCK RIGHT gives your vehicle the ultimate in traction but also gives you more responsibility for its careful operation Traction adding differentials including clutch pack types can get you into trouble in three ways 1 First by giving your vehicle different operating characteristics than before you must take greater care during driving 2 Second by getting you farther up a hill before your vehicle stops getting back down can be more difficult than be fore 3 Third by breaking an axle shaft This way is more subtle but is potentially more dangerous We will carefully ana lyze this situation for you This analysis also holds true for many other types of traction adding differentials including clutch pack limited slip units a Applying Power Because the LOCK RIGHT can apply twice as much of the available engine torque 100 to either axle shaft when compared with the standard differential 50 you must be more careful than before when getting your vehicle out of a rough situation To avoid breakage therefore be sure to apply power smoothly and avoid jerking b Breaking An axle shaft generally will break 11 whe
10. d minor differences in tire diameters some of the time either one side or the other may be slightly unlocked When you get on and off the gas quickly or shift gears you may notice a momentary slight sway at the rear This is because acceleration and deceleration will initially be applied at only one wheel rather than at both wheels until the torque equalizes This effect is easy to become used to but is mentioned for your information Cornering When turning your vehicle try to do so under slight positive throttle If turning is done with a neutral throttle it may tend to buck because of interaction between the free drive shaft rotation and the engine RPM change due to a varying load During normal turning movements on the street you will notice that your new LOCK RIGHT operates easily If you are powering in a turn and then get off the gas torque transfers from the inside driving wheel to the outside decelerating wheel This transfer of torque may tend to change the vehicle direction when turning on slippery surfaces be sure to do so smoothly and avoid jerking If you are in a turn and accelerate sudden ly the vehicle will tend to straighten out because ini tially the inside wheel is the only one that is being pow ered the outside wheel is free wheeling during the turn Be very careful in turns especially on water or ice Driveline Wind up When a vehicle turns each wheel follows a slightly different path This means
11. he thick gear oil will cause a slight pull on the steer ing wheel A solution for this problem is to engage the discon nect mechanism so that both axle shafts are spinning or use a lighter oil Vehicle Performance General The first thing that you will notice about the LOCK RIGHT installed in the rear axle is that it s hard to notice Unlike some other designs it is almost inaudible during cornering and operates with hardly any noise or jerking when driven prop erly In two wheel driving around town your vehicle will behave quite similar to how it did before the LOCK RIGHT was installed Traction A LOCK RIGHT installed in the rear axle of your vehicle will result in much more traction than ever before because it prevents any wheel spin at all unless both wheels spin When either wheel begins to slip the LOCK RIGHT immediately trans fers more torque to the other one to keep you moving instead of getting stuck Thus with a LOCK RIGHT the wheel with the most traction receives the most power In a 4x4 this power dis tributing characteristic is even more effective with another one in the front axle giving your vehicle the ultimate in traction It won t become stuck until all four wheels are spinning Payload The LOCK RIGHT increases the effective trac tive ability of your vehicle but does not increase its payload rating or its load carrying capacity Steering Any effect on steering produced by a LOCK RIGHT in the front axle
12. ied by us and in no situation does it cover abuse caused by high horsepower engines or large diameter tires 1000701MOA V1A 2012
13. ill tend to understeer This effect is produced by limited driveline wind up and continues until one of the wheels slips a little to reieve the tension We therefore recommend that you use four wheel drive only when you need it A Word About Noise During the operation of the many vehicles in which the LOCK RIGHT has been installed we ve sometimes noticed a couple of noises which should be men tioned a Click The LOCK RIGHT released the outside wheel in a turn This means that its coupler or side gear rotates faster than its driver so that the teeth passing by each other pro duce a uniform click click click that can sometimes be heard during turning Cold weather and or thicker oil will decrease the sound this clicking is completely normal and lets you know that everything is functioning properly also see the section about trouble shooting on page 14 b Chirp During cornering the faster outside wheel is free wheeling the slower inside wheel is under power but is having weight transferred off as the vehicle leans toward the out side Under a lot of throttle on the street it may chirp on the pavement as it momentarily loses traction and spins a little to catch up with the outside wheel As soon as it is prevented from rotating any faster by the outside wheel it regains traction This action may repeat several times in the course of a powered turn This condition does not result from any tire scuffing or dragging
14. is hardly noticeable in rugged off road use or in 2WD on road even with the front locking hubs engaged However the vehicle may tend to understeer if it is in 4WD in a place where 4WD is not required such as on a hard dirt road for example Even so a vehicle with two LOCK RIGHTs installed has the best of two worlds maximum traction in 4WD and normal steering in 2WD Backlash The LOCK RIGHT needs about 25 of free drive shaft rotation to allow it to operate producting a slight de lay when getting on and off the throttle This delay does not rep resent any problem with the assembly or with the drive gears This built in backlash characteristic is present in all automatic lockers and is completely normal Off road Operation The places in which you will notice your new LOCK RIGHT are off road Because your vehicle now will climb better than before we suggest that you become familiar with its new capabilities slowly Take it to an off road area in which several types of terrain are present and try each one care fully to see how well your new vehicle performs Only after be coming thoroughly familiar with its new capabilities should you put it through its paces with serious off roading Vehicle Operation Applying Power During normal driving either rear wheel or both may be powered depending on whether or not the vehi cle is turning slightly or has just finished turning Because of these constant small turning movements an
15. le to reach its maximum potential Front Axle Disconnect Operation All modern 4x4 vehicles have a way to save wear on the drive train and increase gas mileage by preventing the front dif ferential from spinning in 2WD Some late vehicles accomplish this feature by disconnecting only one axle shaft in the mid dle rather than by using free wheeling front hubs This design saves cost by eliminating the need for the additional hubs and full floating axles However the differential gears continue to wear The LOCK RIGHT can be installed in these axles however the front ring and pinion gears will continue to rotate the same characteristic as most early 4WD vehicles because of the locking feature of the differential Note This spinning at high speed on road can cause vibration if the drive shaft is unbalanced or if the vehicle has a lift and the U joint angles are not matched If vibra tion occurs carefully check the front end components Free wheeling front hubs cannot be installed in some vehicles because of the axle assembly design With a locker in the front end and the transfer case in the on road 2WD position the only change in vehicle performance will be a slight decrease in gas mileage and a shorter seal life for the drive pinion flange and transfer case front output The life of the drive gears and the other bearings and seals will remain essentially unchanged If the vehicle is to be driven in cold weather the drag produced by t
16. n it is under a lot of power When this happens the wheel on the opposite side will still be powered because of the torque transferring capability of the differential and the vehi cle will tend to turn quickly toward the side on which the break occured When a front axle shaft breaks the remaining powered wheel will also try to turn around the steering knuckle because its pulling is then no longer balanced through the tie bar by the pulling of the other wheel Suddenly having only one front wheel powered can jerk the steering wheel right out of your hands therefore remember Any traction adding differential will give your vehicle more capability but also must be used with more care than a standard differential Full floating Axles If the broken axle shaft is a full floating type many fronts and some rears and the vehi cle continues to be driven after about five minutes of opera tion check the temperature of the affected axle housing by feel and continue to do so occasionally This precaution is because in the unlikely event that the axle has broken near the outer end it can drop down onto the inside of the spindle or housing since the differential is of a traction adding design the axle shaft will keep right on spinning This rubbing may cause heat build up that could eventually lead to damage Front Wheel Drive In some emergency situations it be comes necessary to drive a 4x4 vehicle in front wheel drive only If the vehicle has a
17. ser and or re tail buyer to repair or replace only the parts that we supply if upon our examination they appear to have been installed cor rectly in their intended application have not been abused and are defective in material or workmanship Neither the manu facturer nor seller will be liable for any injury loss damage or inconvenience arising directly or indirectly from the installation or use of these parts or the inability to install or use same It is the purchaser s and or user s responsibility to properly install and use these parts and the purchaser and or user assume all risks and liabilities whatsoever in connection therewith If these stipulations are not acceptable to the purchaser and or user the LOCK RIGHT should not be installed and should be returned to the supplier Installation and use of these parts constitutes ac ceptance of these conditions The LOCK RIGHT is a full locking differential that oper ates in both the front and rear It is a cost effective design be cause our parts fit into your own differential case rather than into a specially manufactured case that would be more expen sive We have carefully designed the LOCK RIGHT to minimize stresses in the stock differential case however tire sizes and or horsepower increases should be taken into account because the vehicle manufacturer s differential parts may have some limita tions Remember our warranty does not cover parts that are not suppl
18. the other one in the opposite direction Repeat for both tires in both directions Servicing The LOCK RIGHT does not require service other than that normally done on the differential as recommended by the vehicle manufacturer Use the recommended lubricant and re place it at the proper intervals also see the section in this manu al about temperature and moisture on page 14 15 Important Warranty Information The following warranty is in lieu of all others express or implied whether oral or written and no person is authorized to make any representation to the contrary Your new LOCK RIGHT is manufactured from careful ly selected steel machined on close tolerance computer con trolled machinery and heat treated for maximum durability The LOCK RIGHT is the result of detailed engineering careful manu facture and most importantly hundreds of thousands of miles of in vehicle operation If any problems occur we will of course do our best to resolve them However because we are unable to control either the installation or the use of these parts our guarantee can only related to their design and manufacture and is as follows Limited Warranty The manufacturer and seller make no warranty ex press or implied with respect to the installation use or appli cation of the LOCK RIGHT locking differential and assume no obligation with respect thereto except for a period of TWO YEARS from the date of sale to the original end u
19. to form a fully locking combination and the coupler also receives the axle shaft to drive the wheels When your vehicle is moving straight ahead both wheels are rotating at the same speed and both clutches are fully engaged locked When your vehicle begins to turn the outside wheel starts to rotate faster than the inside wheel The two clutches sense this difference in speed and allow the cou pler or side gear of the outside clutch to unlock so that the wheel can rotate freely It thus is ground driven faster as the vehicle is turning power continues to be applied to the slow er inside wheel As the vehicle straightens out the wheels again rotate at the same speed and the outside clutch re engages This differentiating action occurs automatically for right and left turns and in both the forward and reverse directions Features Its design is simple and rugged It is an automatic 100 full locking differential that is all gears no belleville washers clutch packs or cone clutches to break or wear out The LOCK RIGHT simply replaces many of the parts inside the standard dif ferential case It uses your own stock differential case bearings pin ion shaft s or spider and thrust washers and also the side gears in some models rather than parts that are all specially made and therefore more expensive It uses stainless steel springs for excellent resistance to high temperatures and fatigue PARTS IN SO
20. traction adding differential in the front steer ing in a turn will become difficult because the inside wheel will continually try to straighten out The vehicle can also be operated as a 4x1 however steering becomes even more difficult because accelerating tends to turn the steering wheel in one direction and decelerating tends to turn it in the other direction Even by hold ing the steering wheel tightly the vehicle still will steer from side to side by itself because of play in the drag link tie rod and steering box Therefore be extremely careful if you must drive with only one front axle Also if one front axle should break when operat ing in front end only two wheel drive the steering would be ad 12 versely affected as described above under Breaking Again remember to hold the steering wheel tightly when driving in dif ficult situations Also driving the vehicle on ice in front wheel drive is not recommended CAUTION Vehicle control will be affected by a broken axle shaft and further damage can occur Replace it as soon as possible Driving Information Summarized Operation Your vehicle essentially will operate nor mally in 2WD on or off road A momentary slight sideways mo tion at the rear may occur when getting on or off the throttle Front axle If you have a LOCK RIGHT in the front axle steering in 2WD will not be affected even with the front hubs engaged also see the next section Hard surfaced roads
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